"Parenthood"fans, we hope you have plenty of tissues handy for this evening, as well as your alcoholic beverage of choice. (Hint: Ours comes in a box.)

"Trouble in Candyland" focuses heavily on Sarah as she leaves Mark behind to go to Los Angeles with Hank. The tension that's been building in her romantic entanglements over the course of the season finally hits a breaking point, and the choices that the characters make may surprise you. Meanwhile, Ryan starts a new job with Joel, but finds himself in over his head, and Julia dedicates herself to getting Victor caught up in school.

Here are five more fun (and not-so-fun) things you can look forward to in tonight's game-changing new episode. Tune in at 10 p.m. EST on NBC.
1. Stoned Kristina! Kristina's cancer takes a backseat in this episode -- in fact, the brilliant Monica Potter is only in one scene -- but we do get a rather hilarious look at how much she's enjoying her new "medicinal" marijuana regimen. With all the gravitas that her breast cancer has brought to the show, it's refreshing (and just generally awesome) to see a little levity amidst all the trauma.

2. Glen Hansard plays us out. Like Landon Pigg before him, Glen Hansard is one Luncheonette recording artist who fits right in with the tone of the show. He gets a pretty decent amount of screen time in tonight's episode, but his shining moment is, of course, singing his gorgeous song "High Hopes" over the closing montage. You can feel it in your bones.
3. Jason Ritter, you are a brilliant genius. Mark Cyr has taken a bit of a backseat this season as Sarah has gotten to know Hank, but tonight's episode
reminds us why Ritter was nominated for an Emmy this year. The love triangle between Mark, Hank, and Sarah reaches a powerful turning point and Ritter's brutally honest, vulnerable, raw performance
will break your heart. If it doesn't, you should see a doctor.

4. Are we calling them Ryber? Ryan and Amber continue to be adorable tonight. We don't see a ton of them together, but they do share the kind of scene that makes you want to doodle hearts in the margins of your geometry notebook, you know? That said, "Parenthood" isn't about to sweep Ryan's struggles under the rug. His problems don't just evaporate because he's falling in love, and that's part of what makes his storyline so powerful, and occasionally painful.

5. Joel at work. We're so used to seeing Joel in the context of his family, but tonight we get to look at his life at work when Amber convinces him to hire Ryan. Boss Joel and Buddy Joel gives off a different vibe than Daddy Joel, and it's cool to see him in his element and taking charge. It also gives Julia a chance for more one-on-one time with Victor, which yields interesting results.